When something goes wrong with an appliance in your home, it’s crucial to find a quick, practical way to repair it. This article, written by PHP editor Xiaoxin, has sorted out the common faults and repair methods of computers and refrigerators, providing you with a practical guide in emergencies. From hardware failures to software problems, this article will analyze them one by one to help you easily solve difficult electrical problems. Come check out the details and get your appliances back up and running!
1. No cooling
Whether the power plug of the refrigerator is plugged in; whether the power socket has power; and whether the power circuit breaker is disconnected. Check whether the refrigerator door light is on to determine whether the refrigerator is connected to power. Check whether the thermostat is in the working gear. The thermostat has a stop gear (0 gear). The compressor will not work if it is placed in the stop gear. If the above items are normal, please contact maintenance personnel to solve the problem.
2. The door body is not straight
In this case, just adjust the door hinge to straighten the door. Loosen the lower hinge screws of the refrigerator, adjust the door position, and then tighten the screws. Loosen the middle hinge screw of the refrigerator, move the door left and right, and tighten the screw after adjustment.
3. The lighting does not light up
If the light bulb is broken, just replace it. In addition, the door light switch has a mechanical failure that does not spring up and cannot be turned on. It can be restored by gently pulling it with your hand. The fault caused by the burrs blocking the edge of the button on the door light switch can be eliminated by scraping off the edge burrs with a small blade. The door light switch of the refrigerator is activated by a small pressing piece, which requires removing the plastic cover. After taking out the pressing piece and the door light switch, first snap the pressing piece into place, then install the door light switch. Once the plastic cover is installed, the fault will be eliminated.
Computer power failure generally has the following phenomena:
Fault 1. There is power output but no display when turned on
Fault phenomenon: There is power output in the computer, but no display when turned on.
Analysis and solution: The possible reason for this failure is that the delay time of the RESET signal input by POWERGOOD is not enough, or POWERGOOD has no output. After starting up, use a voltmeter to measure the output terminal of POWERGOOD. If there is no +5V output, check the delay element again. If the device has +5V, just replace the delay capacitor of the delay circuit.
Fault 2. It will automatically restart every time it is turned on
Fault phenomenon: The computer will automatically restart once every time it is turned on, but now it needs to repeat the self-test before entering the operating system.
Analysis and solution: Rebooting at startup is usually caused by a motherboard failure. Unstable power output may also cause this. Check these two devices.
Fault 3. There is a ignition in the case and the indicator light of the monitor power supply flashes at the same time.
Fault phenomenon: There is a ignition in the case and the indicator light of the monitor power supply flashes.
Analysis and solution: It is very likely that it is a problem with the power supply, because it is difficult for other accessories in the chassis to cause this problem. This means that the components inside the power supply are damaged or short-circuited, so go to a professional for repair or repair. Replace the power supply with a new one.
Fault 4. The computer will automatically shut down after just a few minutes of booting.
Fault phenomenon: The computer is configured with PENTUM3 700, MSI motherboard, modern 128MB, and MAZTOR hard drive. Recently, the computer will automatically shut down after just a few minutes of booting. The indicator lights on the host, optical drive and monitor are all on and the fan is running, but there is no response. Only by turning off the power and restarting can it work normally.
Analysis and solution: After the power supply has been working for a period of time, the heat will become larger, and some components will work unstable, causing the output current to be cut off, so the power supply needs to be repaired.
Fault 5. The host power is automatically turned on when the power switch is turned on
Fault phenomenon: The computer boot sequence is reversed. Normally, the monitor and host should be started manually one by one, but the host power is automatically turned on when the power switch is turned on. .
Analysis and solution: It is very likely that the problem is caused by the settings in the BIOS. In this way, first enter the BIOS of the motherboard to set up, and listen to a function of the PWERON AFRER POWERFALL option in POSERMANAGERMENT to turn off the problem.
Fault 6. You need to remove the power plug and plug it in before restarting
Fault phenomenon: In offline state, when checking QQ messages and letters in FOXMAIL, the computer will suddenly shut down. At this time, the computer will shut down suddenly. There is no response from the power switch. And be sure to remove the power plug and plug it in again before restarting.
Analysis and solution: It is likely that there is a problem with the automatic protection circuit of the power supply. Check whether the mains power is stable. In addition, you can use another power supply first to see if it is caused by the power supply itself.
Fault 7. Restarting during the shutdown process
Fault phenomenon: Recently, every time the shutdown is in progress, the screen will show that it is shutting down, and then it will automatically restart. In addition, sometimes it will automatically restart after entering WINDOWS98 after booting.
Analysis and solution: This is because WINDOWS98 has a bug in the energy control function. If this is the case, you need to install the relevant shutdown patch of WINDOWS98 to solve this problem. If you restart just after entering WINDOWS98, the motherboard is faulty or Caused by improper power current output, you can turn off the advanced management of the power supply in the WINDOWS system control panel.
You have listed common faults that you want to know how to repair. How to answer this question? There are many common faults in monitoring
As a well-known computer brand, Lenovo computers are favored by consumers for their stability and performance. However, during use, Lenovo computers will also encounter various malfunctions. This article will introduce you to some common Lenovo computer failures and provide corresponding repair solutions to help you quickly solve the problem and restore normal use.
When you try to start up your Lenovo computer, you find that the screen is black. This may be caused by a problem with the monitor connection or a system failure. First, you can try reconnecting the monitor's data cable to make sure the connection is secure. If the problem persists, you can try to enter safe mode to repair the system. If safe mode cannot solve the problem, you may need to consider system reinstallation.
During use, Lenovo computer suddenly crashes is a relatively common problem. This could be due to a hardware protection mechanism being triggered due to overheating, or it could be a software conflict causing the system to crash. For this problem, you can try cleaning the radiator, replacing thermal grease, and optimizing system startup items to solve the overheating problem. You can also solve the software conflict problem by uninstalling conflicting software and updating drivers.
Blue screen or system crash is one of the problems that users often encounter when using Lenovo computers. This may be due to hardware failure, driver issues, or corrupted system files. To deal with this problem, you can try to solve it by checking the hardware connection, updating or rolling back the driver, repairing the system files, etc. If the problem persists, you may want to consider contacting professional maintenance personnel or official Lenovo customer service for help.
When using Lenovo computers, the faults described above are only some of the problems that may be encountered, and the solutions are only a common way. If you encounter a problem that cannot be solved, it is recommended that you contact Lenovo customer service or seek professional repair services in time to avoid more serious damage caused by improper personal repairs. I hope this article can help you better understand Lenovo computer repair related knowledge and ensure that your Lenovo computer can run efficiently and stably.
Thank you for reading this article. I hope this article can provide you with some help when solving Lenovo computer problems.
Computers are an indispensable tool in modern life, and hardware failures occur from time to time. As a professional website editor, I will introduce you to common computer hardware failures and repair methods in detail to help you better understand and maintain your computer.
1. The computer cannot be turned on
Power failure: Check whether the power cord is connected properly, whether the power switch is turned on, and whether the power indicator light is on. Motherboard failure: There is a problem with key components on the motherboard such as CPU, memory, etc., and the motherboard needs to be replaced. Hard drive failure: The hard drive is damaged or the wiring is loose. The hard drive may need to be replaced.2. Blue screen error
Driver conflict: Check whether there are newly installed drivers that are incompatible with the system. Memory failure: There is a problem with the memory module. You can try to replace the memory module. Virus infection: There may be malware in the computer and it needs to be disinfected.3. The computer is overheating
Poor cooling: the fan is faulty or the heat sink is dusty. It needs to be cleaned and the fan operation needs to be checked. CPU overclocking: The CPU runs beyond the safe frequency and the CPU frequency needs to be adjusted. Insufficient power supply capacity: The power supply power cannot meet the computer load and needs to be replaced with a larger power supply.For the above common faults, we can take the following maintenance measures:
Check key hardware such as power supply, motherboard, hard disk, etc. to confirm the cause of the fault. Depending on the cause of the fault, choose the appropriate repair method, such as replacing parts or reinstalling the system. Pay attention to operational safety and use maintenance tools rationally to avoid further damage. After the repair is completed, conduct a comprehensive inspection of the computer to ensure that all functions are normal.Through the above introduction, I believe you have a deeper understanding of common computer hardware failures and repairs. If you encounter any problems while using your computer, please feel free to contact me and I will do my best to provide you with professional help and advice. Thank you for reading and wish you a happy use!
In this digital age, tablet computers have become an indispensable electronic device in our daily lives. Whether it is browsing the Internet, watching videos or studying in the office, tablet computers have brought us great convenience. However, just like any other electronic product, tablets are bound to have various glitches and problems. When your tablet breaks down, don't worry, this article will provide you with some useful repair tips to help you easily solve common tablet failures.
Battery failure is one of the most common problems with tablets. If you find that the tablet battery cannot be charged normally or the power is consumed too quickly, you can try the following methods:
Check whether the charging cable and adapter are working properly, and replace with new charging equipment if necessary. Close unnecessary applications and background processes to reduce battery consumption. Adjust screen brightness and other settings to save battery power. If the problem persists, the battery may need to be replaced with a new one.Screen failure is also one of the common problems of tablet computers. If you find that the screen has scratches, dead pixels, or cannot display properly, you can try the following methods:
Use a professional screen protector or case to prevent the screen from being scratched or bumped. Adjust the screen brightness and contrast settings to see if that improves the display. If the problem persists, you may need to replace the screen with a new one.System failure is also one of the common problems of tablet computers. If you find that your tablet is running slowly, apps often crash, or cannot start properly, you can try the following methods:
Restart your tablet to see if that solves the problem. Clean up system junk and cache files to free up more memory space. Uninstall unnecessary applications to reduce system load. If the problem persists, you may need to restore factory settings or update the system.Overall, tablet repair is not as difficult as it seems. As long as you master some basic maintenance skills, most common faults can be easily solved. If you encounter a problem that you cannot solve yourself, you can also seek help from professional maintenance personnel. I hope this article is helpful to you, and I wish you a happy use of your tablet!
Common faults and solutions for power supply maintenance of computer switches
1. Blown fuse
Generally, a blown fuse indicates that there is a problem with the internal circuit of the power supply. Since the power supply operates at high voltage and high current, fluctuations and surges in the grid voltage will cause the current in the power supply to increase instantaneously and cause the fuse to blow. The focus should be to check the rectifier diodes, high-voltage filter electrolytic capacitors, inverter power switch tubes, etc. at the power input end to check whether these components have breakdown, open circuit, damage, etc. If the fuse is indeed blown, you should first check the various components on the circuit board to see if the appearance of these components is burned and whether the electrolyte has overflowed. If the above conditions are not found, use a multimeter to measure whether the switch tube has a breakdown or short circuit. . Special attention should be paid to this: when a component is found to be damaged, you must not turn it on directly after replacing it. This is very likely to damage the replaced component because other high-voltage components are still faulty. Be sure to conduct a comprehensive inspection of all high-voltage components in the above circuit. Only after checking and measuring can the fault of the blown fuse be completely eliminated. ,
2, No DC voltage output or unstable voltage output
If the fuse is intact, there will be no DC voltage output at all levels under load. This situation is mainly caused by the following reasons: open circuit or short circuit in the power supply, failure of the overvoltage and overcurrent protection circuit, auxiliary power supply failure, oscillation circuit not working, overload of the power supply, rectifier diode in the high-frequency rectifier filter circuit Breakdown, filter capacitor leakage, etc. After measuring the secondary components with a multimeter and ruling out the breakdown of the high-frequency rectifier diode and the load short circuit, if the output is zero at this time, it is certain that the control circuit of the power supply is faulty. If there is some voltage output, it means that the front-end circuit is working normally, and the fault lies in the high-frequency rectifier and filter circuit. The high-frequency filter circuit mainly consists of a rectifier diode and a low-voltage filter capacitor to form a DC voltage output. The breakdown of the rectifier diode will cause the circuit to have no voltage output, and the leakage of the filter capacitor will cause unstable output voltage and other faults. Damaged components can be detected by statically measuring the corresponding components with a multimeter.
3. Poor power supply load capacity
Poor power supply load capacity is a common fault. It usually occurs in old-fashioned or long-working power supplies. The main reason is that the components are aging and the switching tube is unstable. There is no Dissipate heat in time, etc. You should focus on checking whether the Zener diode is hot and leaking, the rectifier diode is damaged, the high-voltage filter capacitor is damaged, etc.
1. The conveyor chain should always be kept lubricated and add lithium grease
Specific operation method: When the conveyor belt of the edge banding machine is open, fill the grease gun delivered with the edge banding machine equipment with lithium base Grease, align the oil nozzle with a row of oil nozzles on the lower beam of the edge banding machine, and squeeze 5-8 times to allow the lithium-based grease to completely reach the guide rail.
2. The glue pot needs to be filled with high-temperature grease, and the time period is in weeks
Specific operation method: When the glue pot is opened normally, add high-temperature lubricating oil to the grease gun delivered with the edge banding machine equipment, align the oil outlet with the oil nozzle extending from the base of the glue pot, and perform 6-8 strokes The squeeze allows the high-temperature lubricating oil to completely reach the inside of the bearing of the rubber shaft base to achieve lubrication. When the rubber-coated reduction motor starts to run for 400 hours, the lubricating oil (worm gear, worm special oil, 460 viscosity) should be replaced, and the oil change interval will be 4000 hours thereafter.
3. Check whether the centralized lubricating oil is sufficient
Specific operation method: Visually check whether the lubricating oil in the centralized lubricating oil tank is normal, whether the power signal is normal, and the conventional lubricating oil cannot be lower than the minimum liquid level mark. When the machine is turned on normally The oil pump power light will come on. If there is no refueling in the oil pump for half a year, it means that the pump body is not working or there is a problem, and it needs to be inspected and repaired.
4. Daily check the moisture in the water cup of the triple piece after air intake
Specific operation method: Visually check the liquid level of the triple piece before leaving get off work every day. The third cup in the triple piece is used to collect moisture from the compressed air. Need to be removed manually.
5. Regularly check the integrity and wear of the tool
Specific operation method: You can judge the use of the tool based on the effect of the workpiece after processing, or you can regularly disassemble the dust cover of the tool for visual inspection, depending on the situation.
6. Daily cleaning work after work
Specific operation method: 15 minutes before get off work every day, the operating equipment should be cleaned, mainly for debris, sidebands, dust, etc. inside the machine.
There are many common truck faults, examples are as follows:
Engine failure. Including engine stalling, unstable speed, low cylinder pressure, etc.
Electrical failure. Including generators not generating electricity, lights not shining, horns not sounding, etc.
Brake system failure. Including brake failure, brake bite, etc.
Tire failure. Including tire leaks, punctures, etc.
When a truck breaks down, the driver should stop the truck in time and contact maintenance personnel for inspection. Before contacting the maintenance personnel, the driver can check the condition of the vehicle by himself and inform the maintenance personnel of the fault situation as much as possible, so that the maintenance personnel can understand the vehicle condition more quickly and provide more accurate maintenance solutions.
Common faults include the following: 1. Unable to turn on or no sound output after turning on: It may be due to unstable or damaged power cord connection, poor or damaged internal wiring of the audio host, etc. 2. Noisy or intermittent sound: There may be a problem with the connection between the audio equipment and the signal source, or it may be caused by poor contact or damage to the circuit of the equipment itself. 3. The sound quality has deteriorated: It may be that the audio equipment is aging or needs cleaning and maintenance, or it may be due to problems with the signal source or external interference. 4. The volume cannot be adjusted: The volume adjustment knob may be damaged or stuck, or it may be a wiring problem inside the audio host. For these faults, we can repair them by checking connections, replacing power cords, cleaning and maintenance, and replacing parts. At the same time, regular maintenance and upkeep of audio equipment can effectively avoid the occurrence of common faults.
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